Durable nylon zip fastener

ABSTRACT

A durable nylon zip fastener is formed from a pull and two chains. A chain is formed from chain teeth joined to a cloth tape by means of sewing thread. The pull comprises an upper wing plate and a lower wing plate, the upper wing plate and the lower wing plate being connected together by means of a support core therebetween, forming an accommodation cavity permitting the chains to pass through. The accommodation cavity is provided with two guide inlet openings near a support core end, used to guide in each of the two chains. Another end of the accommodation chamber is provided with a meshing exit opening, used to guide out the two meshed chains. The upper wing plate comprises an upper plate body holding the chain teeth from above and an upper flange part holding the chain teeth from two sides.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a national phase application under 35 U.S.C § 371based upon international patent application No. PCT/CN2020/141665, filedon Dec. 30, 2020, which itself claims priority to Chinese PatentApplication No. 2019113922749, filed on Dec. 30, 2019, the contents ofwhich are incorporated herein by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates to the technical field of nylon zippers,and particularly provides a durable nylon zipper.

BACKGROUND

Zippers are classified into three categories according to theirmaterials: metal zippers, resin zippers, and nylon zippers. The zipperteeth of the nylon zipper are formed by winding a nylon monofilamentaround a central line through a heating and pressing die. Compared withmetal zippers and resin zippers, the nylon zipper has thecharacteristics of low cost, large yield, and high popularization rate.

Refuting to FIG. 1 , the zipper teeth 22 of the nylon zipper in theprior art are formed by winding a nylon monofilament around a centralline 23 through a heating and pressing die, the zipper teeth on twosides and cloth tapes 24 on two sides are combined through sewing lines21 to form two zipper belts 02 of the zipper, and then the two zipperbelts are combined through a puller 01 to form the zipper capable ofbeing opened and closed. Since the zipper teeth 22 are made of hardmaterials, the sewing line 21 necessarily protrudes from the uppersurfaces of the zipper teeth.

The puller 01 combines the two zipper belts by pressing the zipper teeththrough an inner wall of the accommodating cavity. The puller includesan upper wing plate a wing plate that contacts and presses the zipperteeth) and a lower wing plate (a wing plate that contacts and pressesthe cloth tapes). The upper wing plate and the lower wing plate areconnected into a whole through a supporting core to form anaccommodating cavity for the zipper belts to pass through. The upperwing plate includes an upper plate body which is configured for clampingthe zipper teeth from above and an upper flange part which is configuredfor clamping the zipper teeth from two sides. Because an inner wall ofthe upper plate body of the puller of the nylon zipper in the prior arthas a flat surface, the sewing line protruding from the zipper teeth issubjected to the maximum pressing force and is in sliding friction withthe inner wall of the accommodating cavity of the puller, so that thesewing line is easily broken by abrasion. The sewing line is broken byabrasion, which is the most cause of damage to the nylon zipper. if thesewing line can be prevented from being broken by abrasion, the servicelife of the nylon zipper can be greatly prolonged.

SUMMARY

An object of the present disclosure is to avoid the abrasion failure ofsewing lines and prolong the service life of the nylon zipper byoptimizing the structure of the zipper.

In order to achieve the above object of the present disclosure, a nylonzipper of the present disclosure includes zipper belts and a puller. Apuller combines the two zipper belts to form the zipper which can beopened and closed. The zipper belt is formed by combining zipper teethand a cloth tape through a sewing line. The puller includes an upperwing plate and a lower wing plate. The upper wing plate and the lowerwing plate are connected into a whole through a supporting core to forman accommodating cavity for the zipper belts to pass through. Theaccommodating cavity is provided with two leading-in ports which isconfigured for leading in the two zipper belts, at one end adjacent tothe supporting core, of the accommodating cavity. The accommodatingcavity is provided with a meshing outlet which is configured for leadingout the two meshed zipper belts at the other end thereof. The upper wingplate includes an upper plate body which is configured for clamping thezipper teeth from above and an upper flange part which is configured forclamping the zipper teeth from two sides. Two avoiding grooves arearranged at positions of an inner surface of the upper plate bodycorresponding to the sewing lines of the zipper belts. The avoidinggrooves are recessed from the inner surface of the upper plate body, andextend through the upper plate body from the end where the leading-inports are located to the end where the meshing outlet is located, whichare used for avoiding sliding friction between the sewing lines and theupper plate body.

Preferably, two convex teeth are provided at two sides of the innersurface of the upper plate body (namely, the corner positions adjacentto the upper flange part), respectively. The convex teeth extend fromthe end where the leading-in ports are located, of the upper plate bodyto the end where the meshing outlet is located, and are used for fillingthe chamfering space of the zipper teeth and generating oblique inwardand downward pressure on the zipper teeth, so that the zipper teeth aremeshed. The convex teeth and the inner surface of the upper plate bodyform a stepped shape. The convex teeth are in arc transition with theupper flange part. The convex teeth structure enables the zipper teethto have elastic retractable space in the horizontal direction, and thezipper teeth are automatically meshed at an optimal position.

Preferably, the lower wing plate includes a lower plate body configuredfor clamping the zipper teeth upwardly and a lower flange partconfigured for clamping the cloth tapes upwardly from two sides. Thelower flange part protrudes from an inner surface of the lower platebody to form a groove. Under normal conditions, the sewing lines can berecessed in the surfaces of the cloth tapes due to a force, and therewill be no direct contact between the sewing lines and the lower platebody. However, the lower wing plate can reduce the function forcebetween the cloth tape and the lower plate body and prolong the servicelife of the zipper.

Preferably, an upper rib is provided at a connecting part of the upperplate body and the supporting core. The upper rib protrudes from theinner surface of the upper plate body. A lower rib is provided at aconnecting part of the lower wing plate and the supporting core. Thelower rib protrudes from an inner surface of the lower wing plate. Theupper rib and the lower rib are used for filling the chamfering space ofthe zipper teeth and generating pressure on the zipper teeth, so thatthe zipper teeth are convenient to be meshed.

According to the nylon zipper of the present disclosure, the upper platebody is provided with the avoiding grooves, and the zipper teeth are incontact with the inner surface of the upper plate body, so that slidingfriction between the sewing lines and the puller is avoided, and theservice life of the zipper is prolonged.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view of a nylon zipper in the prior art.

FIG. 2 is a schematic view of a nylon zipper according to Embodiment 1.

FIG. 3 is a schematic view of zipper belts according to Embodiment 1.

FIG. 4 is a schematic view of a puller according to Embodiment 1.

FIG. 5 is an enlarged view of portion A of FIG. 4 .

FIG. 6 is a schematic view of a nylon zipper according to Embodiment 2.

FIG. 7 is a schematic view of a puller according to Embodiment 2.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The preferred embodiments of the present disclosure will be furtherdescribed with reference to the accompanying drawings.

Embodiment 1

A zipper in this embodiment is a positive nylon zipper. Referring toFIGS. 2-5 , the nylon zipper in this embodiment includes zipper belts102 and a puller 101. One puller 101 combines the two zipper belts 102to form the zipper which can be opened and closed. The zipper belt 102is formed by combining zipper teeth 122 wound around a central line 123and a cloth tape 124 through a sewing line 121. The puller 101 includesa pull tab 131, an upper wing plate 132, and a lower wing plate 133. Theupper wing plate 132 and the lower wing plate 133 are connected into awhole through a supporting core 134 to form an accommodating cavity forthe zipper belts to pass through. The accommodating cavity is providedwith two leading-in ports which is configured for respectively leadingin the two zipper belts at one end adjacent to the supporting core, ofthe accommodating cavity. The accommodating cavity is provided with ameshing outlet which is configured for leading out the two meshed zipperbelts at the other end thereof. The upper wing plate 132 includes anupper plate body 1321 which is configured for clamping the zipper teethfrom above and an upper flange part 1322 which is configured forclamping the zipper teeth from two sides. Two avoiding grooves 111 arearranged at positions of an inner surface of the upper plate body 1321corresponding to the sewing lines of the zipper belts. The avoidinggrooves 111 are recessed from the inner surface of the upper plate body1321, and extend through the upper plate body from the leading-in portend to the meshing outlet end, which can avoid sliding friction betweenthe sewing lines and the upper plate body. A depth of the avoidinggroove 111 can be set according to the protruding amount of the sewingline, and generally set to be 1 mm-3 mm. The pull tab 131 is connectedabove the upper wing plate 132.

Two convex teeth 202 are provided at two sides of an inner surface 201of the upper plate body 1321 (namely, the corner positions adjacent tothe upper flange part), respectively. The convex teeth 202 extend fromthe leading-in port end of the upper plate body to the meshing outletend, and are used for filling the chamfering space of the zipper teethand generating oblique inward and downward pressure on the zipper teeth,so that the zipper teeth are meshed. The convex teeth 202 and the innersurface of the upper plate body 1321 form a stepped shape, and theconvex teeth 202 are in arc transition with the upper flange part 1322.The convex tooth structure enables the zipper teeth to have elasticretractable space in the horizontal direction, and the zipper teeth areautomatically meshed at an optimal position.

The lower wing plate 133 includes a lower plate body 1331 configured forclamping the zipper teeth upwardly and a lower flange part 1332configured for clamping the cloth tapes upwardly from two sides. Thelower flange part 1332 protrudes from an inner surface of the lowerplate body 1331 to form a groove 112. The lower wing plate structure canreduce the friction force between the cloth tapes 124 and the lowerplate body 1331 and prolong the service life of the zipper.

An upper rib 141 is provided at a connecting part of the upper platebody 1321 of the upper wing plate 132 and the supporting core 134. Theupper rib 141 protrudes from the inner surface of the upper plate body1321. A lower rib 142 is provided at a connecting part of the lower wingplate 133 and the supporting core 134. The lower rib 142 protrudes froman inner surface of the lower wing plate. The upper rib and the lowerrib are used for filling the chamfering space of the zipper teeth andgenerating pressure on the zipper teeth, so that the zipper teeth areconvenient to be meshed.

Embodiment 2

A zipper in this embodiment is a negative nylon zipper. Referring toFIGS. 6 and 7 , the nylon zipper in this embodiment includes zipperbelts 102 and a puller 101. One puller 101 combines the two zipper belts102 to form the zipper which can be opened and closed. The zipper belt102 is formed by combining zipper teeth 122 wound around a central line123 and a cloth tape 124 through a sewing line 121. The puller 101includes a pull tab 131, an upper wing plate 132, and a lower wing plate133. The upper wing plate 132 and the lower wing plate 133 are connectedinto a whole through a supporting core 134 to form an accommodatingcavity for the zipper belts to pass through. The accommodating cavity isprovided with two leading-in ports which is configured for respectivelyleading in the two zipper belts at one end adjacent to the supportingcore, of the accommodating cavity. The accommodating cavity is providedwith a meshing outlet which is configured for leading out the two meshedzipper belts at the other end thereof. The upper wing plate 132 includesan upper plate body 1321 which is configured for clamping the zipperteeth from above and an upper flange part 1322 which is configured forclamping the zipper teeth from two sides. Two avoiding grooves 111 arearranged at positions of an inner surface of the upper plate body 1321corresponding to the sewing lines of the zipper belts. The avoidinggrooves 111 are recessed from the inner surface of the upper plate body1321, and extend through the upper plate body from the leading-in portend to the meshing outlet end, which can avoid sliding friction betweenthe sewing lines and the upper plate body. The pull tab 131 is connectedto an outer surface of the lower wing plate 133.

Two convex teeth are provided at two sides of the inner surface of theupper plate body 1321 (namely, the corner positions adjacent to theupper flange part), respectively. The convex teeth extend from theleading-in port end of the upper plate body to the meshing outlet end,and are used for filling the chamfering space of the zipper teeth andgenerating oblique inward and downward pressure on the zipper teeth, sothat the zipper teeth are meshed. The convex teeth and the inner surfaceof the upper plate body 1321 form a stepped shape, and the convex teethare in arc transition with the upper flange part 1322. The convex toothstructure enables the zipper teeth to have elastic retractable space inthe horizontal direction, and the zipper teeth are automatically meshedat an optimal position.

The lower wing plate 133 includes a lower plate body 1331 configured fordamping the zipper teeth upwardly and a lower flange part 1332configured for clamping the cloth tapes upwardly from two sides. Thelower flange part 1332 protrudes from an inner surface of the lowerplate body 1331 to form a groove 112. The lower wing plate structure canreduce the friction force between the cloth tape 124 and the lower platebody 1331 and prolong the service life of the zipper.

An upper rib 141 is provided at a connecting part of the upper platebody 1321 of the upper wing plate 132 and the supporting core 134. Theupper rib 141 protrudes from the inner surface of the upper plate body1321. A lower rib 142 is provided at a connecting part of the lower wingplate 133 and the supporting core 134. The lower rib 142 protrudes froman inner surface of the lower wing plate. The upper rib and the lowerrib are used for filling the chamfering space of the zipper teeth andgenerating pressure on the zipper teeth, so that the zipper teeth areconvenient to be meshed.

1. A durable nylon zipper, formed by combining two zipper belts by apuller; the zipper belt being formed by combining zipper teeth and acloth tape through a sewing line, wherein: the puller comprises an upperwing plate and a lower wing plate; the upper wing plate and the lowerwing plate are connected into a whole through a supporting core to forman accommodating cavity for the zipper belts to pass through; theaccommodating cavity is provided with two leading-in ports which isconfigured for leading in the two zipper belts, at one end adjacent tothe supporting core, of the accommodating cavity; the accommodatingcavity is provided with a meshing outlet which is configured for leadingout the two meshed zipper belts at the other end thereof; the upper wingplate comprises an upper plate body configured to clamp the zipper teethfrom above and an upper flange part configured to clamp the zipper teethfrom two sides; two avoiding grooves are arranged at positions of aninner surface of the upper plate body corresponding to the sewing linesof the zipper belts; the avoiding grooves are recessed from the innersurface of the upper plate body, and extend through the upper plate bodyfrom the end where the leading-in ports are located to the end where themeshing outlet is located.
 2. The durable nylon zipper of claim 1,wherein two convex teeth are provided at two sides of the inner surfaceof the upper plate body, respectively; the convex teeth extend from theend where the leading-in ports of the upper plate body are located tothe end where the meshing outlet is located.
 3. The durable nylon zipperof claim 2, wherein the convex teeth and the inner surface of the upperplate body form a stepped shape, and the convex teeth are in arctransition with the upper flange part.
 4. The durable nylon zipper ofclaim 1, wherein the lower wing plate comprises a lower plate bodyconfigured to upwardly clamp the zipper teeth and a lower flange partconfigured to upwardly clamp the cloth tapes from two sides; the lowerflange part protrudes from an inner surface of the lower plate body toform a groove.
 5. The durable nylon zipper of claim 1, wherein an upperrib is provided at a connecting part of the upper plate body and thesupporting core, and the upper rib protrudes from the inner surface ofthe upper plate body; a lower rib is provided at a connecting part ofthe lower wing plate and the supporting core, and the lower ribprotrudes from an inner surface of the lower wing plate.